Vapor pressure of a liquid homework

AI Thread Summary
If the vapor pressure of a liquid at 25 degrees Celsius is 200 torr and the pressure is lowered to 190 torr, the liquid will evaporate. The reasoning is that the decrease in pressure allows for more molecules to escape from the liquid phase to the vapor phase. While evaporation typically occurs under isobaric conditions, lowering the pressure can facilitate this process. The discussion emphasizes understanding the relationship between vapor pressure and external pressure. Thus, the conclusion is that the liquid will indeed evaporate under the reduced pressure.
glasshut137
Messages
23
Reaction score
0
[SOLVED] vapor pressure

Homework Statement



the vapor pressure of a liquid at 25 degrees celcius is 200 torr. If the pressure over the liquid is lowered to 190 torr at 25 degrees celsius the liquid will...

a)evaporate
b)boil
c)freeze

Homework Equations





The Attempt at a Solution



ok, so i think it would evaporate since the vapor pressure would decrease and therefore the decrease in pressure holding the liquid together would allow evaporation to take place. Can someone tell me if my reasoning is correct?
 
Physics news on Phys.org
You are close but consider that evaporation is usually applied to liquids under isobaric conditions. What happens to a liquid when you subject it to a slight vacuum (or slightly lower)?
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
View full post »

Similar threads

Vapor pressure -- How does water still boil at 100°C in an open pot?
Replies
35
Views
5K
How Much CCl4 Remains Liquid at Equilibrium in a Sealed Flask?
Replies
3
Views
4K
Grams of solute needed to lower vapor pressure of solvent?
Replies
36
Views
8K
Does pressure affect equilibrium vapor pressure (or RH)?
Replies
8
Views
3K
Which Statements About Vapor Pressure Are True?
Replies
2
Views
6K
How does water vapor in the atmosphere form under normal conditions?
Replies
12
Views
7K
Phase Equilibrium of Liquid and Vapor Under External Pressure
Replies
9
Views
2K
Does Pressure in Phase Diagram refer to vapor pressure?
Replies
27
Views
6K
Just curious about many things like hydrostatics
Replies
28
Views
4K
What is the pressure surrounding a liquid at its boiling point?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top